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Radial Engineering McBoost Dynamic and Ribbon Mic Enhancer

Mic signal booster, class-A fet with 25dB gain, load adjust and filter
MFR# R800 8016

Product Description

The Radial Engineering McBoost is a microphone signal booster designed to elevate the output of a typical dynamic microphone for greater transient response and boost the signal of a low-output ribbon mic to bring it up to a usable level for mixing consoles, preamps and workstations that may not provide sufficient gain. It features a 100% discrete Class A dual-transistor J-FET circuit that can produce up to 25 dB of gain without introducing noise, color or artifact.

A 14-gauge I-beam reinforced steel enclosure prevents outside stress from torquing the sensitive PC board which otherwise could lead to premature part failure. A book-end cover creates protective zones at each end to safeguard the switches, potentiometer and connectors from the rigors of the road. Powered using standard 48-Volt phantom, connect the McBoost using standard 3-pin XLR cables. Three impedance settings optimize the response. Whether you are in a recording studio, on a live concert stage or in the middle of a broadcast event, the McBoost elevates the output of your mic to improve signal-to-noise while it adds clarity, excitement and extra drive for long cables.


  • OUTPUT: Balanced male XLR output – used to connect to your mixer or preamp and supply power to the McBoost from standard 48V phantom
  • INPUT: Balanced XLR female input used to connect your dynamic or ribbon mic
  • LOAD: 3-position switch lets you adjust the impedance to optimize the signal transfer from your microphone
  • LEVEL: 3-position lets you select your output level - FULL for 100% gain, HALF for 50% gain or VARI to control the gain with the rotary level control
  • GAIN: Variable control lets you boost the gain of your microphone from +4 dB to +25 dB

Product Specifications

Input ConnectorsAnalog XLR
Output ConnectorsAnalog XLR

Product Reviews

5 out of 5 stars.
Review Count (1)

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Essential small piece of gear that makes the ultimate difference. I bought this to use with my Shure SM7B and it turned this mic from a good one to an incredible, world-class sounding go-to mic.

By Matthew B on June 2, 2020

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